fix：第一轮跑

lib/common/services/cache_clear_service.dart

@@ -0,0 +1,38 @@
+import 'dart:io' show Platform;
+
+import 'package:android_intent_plus/android_intent.dart';
+import 'package:flutter_cache_manager/flutter_cache_manager.dart';
+import 'package:flutter/foundation.dart' show kIsWeb;
+import 'package:package_info_plus/package_info_plus.dart';
+
+import '../storage/storage_service.dart';
+
+/// Clears only disposable presentation data. Credentials and user preferences
+/// deliberately remain outside this service.
+class CacheClearService {
+  const CacheClearService._();
+
+  static Future<void> clear() async {
+    await DefaultCacheManager().emptyCache();
+    await SplashAdControllerPlaceholder.clear();
+  }
+
+  static bool get requiresSystemSettings => !kIsWeb && Platform.isAndroid;
+
+  static Future<void> openAndroidSystemSettings() async {
+    final packageName = (await PackageInfo.fromPlatform()).packageName;
+    await AndroidIntent(
+      action: 'android.settings.APPLICATION_DETAILS_SETTINGS',
+      data: 'package:$packageName',
+    ).launch();
+  }
+}
+
+/// CacheClearService is used outside Riverpod; the splash entry itself lives
+/// in SharedPreferences and is removed here without touching user data.
+abstract final class SplashAdControllerPlaceholder {
+  static Future<void> clear() async {
+    await StorageService.to.preferences.remove('ads.splash.entry');
+    await StorageService.to.preferences.remove('ads.splash.daily');
+  }
+}

lib/common/services/device_header_service.dart

@@ -185,6 +185,12 @@ class DeviceHeaderService {
     await StorageService.to.setBool(storagePrivacyAgreed, true);
   }
 
+  /// ATT 授权后写入 IDFA；后续请求通过 platformIdentityHeaders 自动带上。
+  Future<void> saveIosIdfa(String value) async {
+    if (value.trim().isEmpty) return;
+    await StorageService.to.setString(storageIosIdfa, value.trim());
+  }
+
   /// 是否需要首启隐私合规确认。**仅 Android**（合规要求：同意前不得采集设备
   /// 标识）。由 go_router redirect 调用，未同意则强制跳隐私页。
   bool get privacyConsentRequired => requiresAndroidPrivacyConsent(